If you found the original video of Nirvana frontman Kurt Cobain reanimated for Guitar Hero 5 uncomfortable to watch, seeing his polygonal ghost prance about and sing the songs of Bush and Megadeth may simply be too much.

Activision will squeeze more cash from the stone that is Guitar Hero with Guitar Hero:Greatest Hits. No, not Modern Hits. This is the ultimate cash-in, a "best of" compilation for Guitar Hero World Tour.

We'll bet you never saw this one coming. A recent filing with the U.S. Patent and Trademark Office shows that Activision has filed a mark for Dance Hero, claiming services such as "interactive video game programs" and "video game controllers." The filing comes soon after first details on DJ Hero were posted on Kotaku,…